CN107402453B - 3D display device - Google Patents
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- CN107402453B CN107402453B CN201710866959.7A CN201710866959A CN107402453B CN 107402453 B CN107402453 B CN 107402453B CN 201710866959 A CN201710866959 A CN 201710866959A CN 107402453 B CN107402453 B CN 107402453B
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
Abstract
The present invention provides a 3D display device, comprising: the display screen comprises a display surface, wherein the display surface comprises a sub-image array, the sub-image array comprises a plurality of sub-image elements arranged in an array, and each sub-image element comprises a plurality of display pixels; the micro lens array is used for synthesizing images displayed by the plurality of sub image elements into a three-dimensional image, is arranged on one side of the display surface of the display screen and comprises a plurality of lens elements which are arranged in an array mode, and each lens element is arranged corresponding to one sub image element; the display pixels at different positions on the display surface of the display screen have different distances from the optical centers of the corresponding lens elements. The 3D display device is an integrated imaging 3D display device, the depth of a 3D picture viewed by a user is greatly enhanced without losing the resolution of the image, and the 3D display device has different layers and enhanced stereoscopic impression.
Description
Technical Field
The invention relates to the technical field of display, in particular to a 3D display device.
Background
The integrated imaging three-dimensional display device generally comprises a display screen and a micro-lens array arranged on one side of a display surface of the display screen, and the display principle is that a sub-image element array of an acquired space scene is loaded on the display screen, each sub-image element records part of information in the space scene, and the three-dimensional information of the whole space scene is recorded by the sub-image element array formed by integrating all the sub-image elements. Each sub-picture element has a lens element to which it corresponds exactly. According to the principle that the light path is reversible, the light rays emitted by all the sub-image elements are converged and restored by the reconstruction micro-lens array, and a three-dimensional image is reconstructed on the front surface of the micro-lens array.
Compared with the vision-aided and grating 3D display technology, the 3D display based on integrated imaging has the remarkable advantages of no stereoscopic viewing asthenopia and the like, and is a true 3D display. Compared with holographic 3D display, 3D display based on integrated imaging has the advantages of relatively small data volume, no need of coherent light source, no harsh environmental requirements and the like, and becomes one of international leading edge 3D display modes at present. However, the conventional integrated imaging has a problem that the depth range of an image is small, which impairs the stereoscopic feeling of a three-dimensional space when viewed.
Disclosure of Invention
The invention aims to provide a 3D display device which can solve the problem that the depth range of a traditional integrated imaging 3D display image is limited and effectively enhance the three-dimensional space stereoscopic impression.
The technical scheme provided by the invention is as follows:
a 3D display device comprising:
a display screen comprising a display surface, said display surface comprising a sub-image array, said sub-image array comprising a plurality of sub-image elements arranged in an array, each of said sub-image elements comprising a plurality of display pixels;
the micro lens array is used for synthesizing images displayed by the plurality of sub image elements into a three-dimensional image and is arranged on one side of the display surface of the display screen, the micro lens array comprises a plurality of lens elements which are arranged in an array mode, and each lens element is arranged corresponding to one sub image element;
the display screen comprises a display screen and a lens element, wherein the display screen comprises a plurality of display pixels and a plurality of lens elements, and the display pixels at different positions on the display surface of the display screen are arranged at different distances from the optical centers of the corresponding lens elements.
Further, the distance between at least one part of display pixels of the display surface of the display screen and the corresponding optical center of the lens element is smaller than the focal length of the lens element, and the distance between at least another part of display pixels of the display surface of the display screen and the corresponding optical center of the lens element is larger than the focal length of the lens element.
Furthermore, the display screen is a first curved surface display screen with the middle part depressed towards the direction far away from the micro-lens array;
the distance between the display pixel of the edge area of the display surface of the first curved surface display screen and the corresponding optical center of the lens element is smaller than the focal length of the lens element, and the distance between the display pixel of the middle area of the display surface of the first curved surface display screen and the corresponding optical center of the lens element is larger than the focal length of the lens element.
Further, the distance between the display pixels of the display surface of the first curved display screen and the optical center of the corresponding lens element gradually decreases from the middle area of the display screen to the edge area of the display surface.
Furthermore, the display screen is a second curved surface display screen with the middle part protruding towards the direction close to the micro-lens array; the distance between the display pixel of the edge area of the display surface of the second curved surface display screen and the corresponding optical center of the lens element is larger than the focal length of the lens element, and the distance between the display pixel of the middle area of the display surface of the second curved surface display screen and the corresponding optical center of the lens element is smaller than the focal length of the lens element.
Further, the distance between the display pixels of the display surface of the second curved display screen and the optical center of the corresponding lens element gradually increases from the middle area of the display screen to the edge area of the display surface.
Further, the optical center of each lens element in the microlens array is on a plane.
Furthermore, the microlens array is a curved surface microlens array, the optical center of each lens element of the curved surface microlens array is positioned on a curved surface, and the curved surface microlens array is symmetrically arranged towards two sides by taking the middle lens element as a center; wherein the content of the first and second substances,
the curved surface micro lens array is a first curved surface micro lens array with the middle part protruding towards the direction close to the display screen, the distance between a display pixel in the edge area of the display surface of the display screen and the corresponding lens element is smaller than the focal length of the lens element, and the distance between a display pixel in the middle area of the display surface of the display screen and the corresponding lens element is larger than the focal length of the lens element;
or, the curved surface microlens array is the second curved surface microlens array that the middle part is to keeping away from the direction of display screen is sunken, just the marginal zone's of the display surface of display screen display pixel and corresponding distance between the lens unit is greater than the focus of lens unit, the regional display pixel of the middle part of the display surface of display screen and corresponding distance between the lens unit is less than the focus of lens unit.
Further, the display screen is a flat display screen.
Further, the pitch of the lens elements is equal to the pitch of the sub-image elements.
The invention has the following beneficial effects:
the 3D display device provided by the invention is an integrated imaging 3D display device, has the advantage of no three-dimensional impression fatigue, the distances between the display pixels of the display screen at different positions and the microlens array are different, thus, the distances between the display pixels at different positions of the display screen and the microlens array can present different size relations with the focal length of the lens element, compared with the mode that the distances between the display pixels at each position of the display screen and the microlens array in the traditional integrated imaging 3D display device are the same, the 3D picture depth observed by a user is greatly enhanced while the image resolution is not damaged, the layers are different, and the three-dimensional impression is enhanced.
Drawings
FIG. 1 is a schematic view showing an imaging principle of a conventional integrated imaging display device;
fig. 2 is an imaging schematic diagram showing a real image mode of a conventional integrated imaging display device;
fig. 3 illustrates an imaging principle diagram of a virtual image mode of a conventional integrated imaging display device;
fig. 4 shows an imaging schematic diagram of a first embodiment of a 3D display device provided by the present invention;
fig. 5 is a schematic structural diagram of a 3D display device according to a first embodiment of the present invention;
fig. 6 shows an imaging schematic diagram of a second embodiment of a 3D display device provided by the present invention;
fig. 7 is a schematic structural diagram of a 3D display device according to a second embodiment of the present invention;
fig. 8 illustrates an imaging schematic diagram of a third embodiment of a 3D display device provided by the present invention;
fig. 9 is a schematic structural diagram of a third embodiment of a 3D display device according to the present invention;
fig. 10 shows an imaging schematic diagram of a fourth embodiment of a 3D display device according to the present invention;
fig. 11 is a schematic structural diagram of a fourth embodiment of a 3D display device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Aiming at the problems of small image depth range and poor three-dimensional space stereoscopic impression of an integrated imaging 3D display device in the prior art, the invention provides the 3D display device, which can solve the problem of limited depth range of the traditional integrated imaging 3D display image and effectively enhance the three-dimensional space stereoscopic impression.
As shown in fig. 4 to 11, the 3D display device provided by the present invention includes:
a display screen 100, said display screen 100 comprising a display surface, said display surface comprising a sub-image array (not shown in the figures), said sub-image array comprising a plurality of sub-image elements arranged in an array, each of said sub-image elements comprising a plurality of display pixels;
and a microlens array 200 for synthesizing the images displayed by the plurality of sub-image elements into a three-dimensional image, the microlens array 200 being disposed on the display surface side of the display screen 100, the microlens array 200 including a plurality of lens elements 210 arranged in an array, each lens element 210 being disposed corresponding to one of the sub-image elements, the pitch of the lens elements 210 being equal to the pitch of the sub-image elements;
wherein, the display pixels at different positions on the display surface of the display screen 100 have different distances from the optical centers of the corresponding lens elements 210.
The 3D display device provided by the invention is an integrated imaging 3D display device, has the advantage of no stereoscopic impression fatigue, and the distances between the display pixels at different positions of the display screen 100 and the microlens array 200 are different, so that the distances between the display pixels at different positions of the display screen 100 and the microlens array 200 are different from the focal length of the lens element 210.
Before explaining the 3D display device of the present invention in detail, an imaging principle of the integrated imaging 3D display device will be explained first.
As shown in fig. 1, the conventional integrated imaging 3D display device includes a display screen 10 and a microlens array 20 disposed in front of a display surface of the display screen 10, the display surface of the display screen 10 includes a sub-image array 11, the sub-image array 11 includes a plurality of sub-image elements 12 arranged in an array, each sub-image element 12 includes a plurality of display pixels 13, the microlens array 20 includes a plurality of lens elements 21 arranged in an array, each lens element 21 is disposed corresponding to one sub-image element 12, and the display screen 10 is a flat display screen, and distances g between optical centers of the display pixels 13 at positions on the display surface of the display screen 10 and the corresponding lens elements 21 are all equal.
In the conventional integrated imaging display 3D image, light rays emitted from the display pixels 13 on the display screen 10 are refracted by the microlens array 20 and focused to form a crossing point, and a plane where the crossing point is located is referred to as a central depth plane a, on which an image with the highest resolution can be displayed, as shown in fig. 1.
The distance l from the central depth plane a to the microlens array 20 is given by the gaussian imaging formula:
where f is the focal length of the microlens array 200, g is the distance between a display pixel on the display screen and the optical center of the corresponding lens element, and l is the distance between the central depth plane and the optical center of the microlens array.
As shown in fig. 2, the 3D images displayed by the microlens array 20 of the sub-image array 11 on the display screen 10 are located on different planes, which are referred to as integration planes, and thus, one 3D image has different integration planes in space (only one integration plane b is shown in fig. 2 for ease of understanding). When the distance between the integration plane b and the central depth plane a exceeds a certain threshold, the image points of the 3D image are spread out greatly and the image may become blurred. Therefore, the integration plane b cannot be too far from the central depth plane a, and the 3D image is limited to a range between two critical integration planes (such as the range between the integration plane b1 and the integration plane b2 shown in fig. 1), resulting in a smaller depth range of the 3D image.
According to the difference of the size relation of g and f, the display modes of integrated imaging are divided into a real mode, a virtual mode and a focusing mode. When g > f, the integrated imaging display content is a real image, and the 3D image imaging position is in front of the micro lens array 20, as shown in fig. 2, so that in the real image mode, the integrated imaging can achieve the stereoscopic effect of the screen; when g < f, the integrated imaging display content is a virtual image, and the 3D image imaging position is behind the microlens array 20, as shown in fig. 3, so that in the virtual image mode, the integrated imaging can achieve a stereoscopic effect of screen entry; when g is equal to f, the scattered light emitted from the display pixels 13 on the display will become parallel light after passing through the microlens array 20, so that the sub-picture elements 12 cannot be imaged through the lens elements 21 in this case, and a 3D image composed of parallel light emitted from each lens element 21 can be displayed either in front of the microlens array 20 or behind the microlens array 20, which is called a focusing mode.
On the premise that the size of the display screen 10 is determined (assuming that the size of the display screen 10 is "1"), the resolution of the 3D image is R as shown in fig. 1IPixel size of 3D image is PIThe resolution of the display screen 10 is RdDisplay screen 10 has a pixel size of PdThe following relationship exists between l and gComprises the following steps:
wherein, P0Is the pitch of the lens elements 21 and the sub-image elements 12, and, therefore,
when the diffraction effect of the microlens array 20 is neglected, the depth △ Z of the 3D image is:
from the above relationship, the pitch P of the lens elements 21 and the sub-image elements 120Increase, decrease the image resolution RI(ii) a While the pitch P of the lens elements 21 and the sub-image elements 120decreasing, the image depth △ Z will be decreased.
in order to increase the image depth △ Z without losing the image resolution, the 3D display device provided by the invention has the advantages that the distances between the display pixels at different positions of the display surface of the display screen and the microlens array are different, so that the distances between the display pixels at different positions of the display screen and the microlens array and the focal length of the lens element are in different size relations, and compared with the mode that the distances between the display pixels at each position of the display surface of the display screen and the microlens array in the traditional integrated imaging 3D display device are the same, the 3D picture depth observed by a user is greatly enhanced, the layers are different, and the stereoscopic impression is enhanced.
In the embodiment provided by the present invention, preferably, a distance g between at least one portion of the display pixels on the display surface of the display screen 100 and the corresponding optical center of the lens unit 210 is smaller than the focal length f of the lens unit 210, and a distance g between at least another portion of the display pixels on the display surface of the display screen 100 and the corresponding optical center of the lens unit 210 is greater than the focal length f of the lens unit 210.
With the above scheme, as shown in fig. 4, the distance g between a part of the display pixels in the display screen 100 and the microlens array 200 is smaller than the focal length f of the microlenses, the 3D image imaging position is behind the microlens array 200 (e.g., the central depth plane a1 and the integrated plane b1 are behind the microlens array 200 in fig. 4), and the screen-in effect is presented; and the distance g between the display pixels of the other part of the display screen 100 and the microlens array 200 is greater than the focal length f of the microlenses, and the 3D image imaging position is in front of the microlens array 200 (e.g., the central depth plane a2 and the integrated plane b2 are in front of the microlens array 200 in fig. 4), so that the screen effect is exhibited. Therefore, the depth of the whole 3D picture viewed by a user is greatly enhanced, and the stereoscopic impression is enhanced along with different layers.
It should be understood that the distances g between the display pixels at different positions in the display screen 100 and the optical centers of the corresponding lens elements 210 may also be smaller than the focal length f of the lens elements 210, or larger than the focal length f of the lens elements 210.
The distance between the display screen 100 and the microlens array 200 may be different and may be implemented in various ways, and several preferred embodiments of the 3D display device provided by the present invention are described below.
Example 1
Fig. 4 and 5 are schematic structural diagrams illustrating a 3D display device according to a first embodiment of the present invention.
As shown in fig. 4 and 5, in the present embodiment, the display screen 100 is a first curved display screen with a concave middle portion facing away from the microlens array 200. The distance between the display pixel of the edge region of the display surface of the first curved display screen and the corresponding optical center of the lens element 210 is smaller than the focal length of the lens element 210, and the distance between the display pixel of the middle region of the display surface of the first curved display screen and the corresponding optical center of the lens element 210 is greater than the focal length of the lens element 210.
In this embodiment, the display panel 100 may be any display device such as an LCD, an OLED, etc., and the display panel 100 is designed as a curved display panel, and the optical centers of the lens elements 210 in the microlens array 200 are located on a plane, so that the distances between the display pixels in the edge area and the middle area of the display panel 100 and the microlens array 200 are different, and preferably, the distance between the display pixels in the edge area of the display panel 100 and the optical centers of the corresponding lens elements 210 is smaller than the focal length of the microlens array 200, and the 3D image imaging position is located behind the microlens array 200 (e.g., the central depth plane a1 and the integrated plane b1 are located behind the microlens array 200 in fig. 4), so as to present a screen-in effect; and the distance g between the display pixels in the middle area of the display screen 100 and the microlens array 200 is greater than the focal length f of the microlenses, the central depth plane a2 of the 3D image imaging is located in front of the microlens array 200 (as shown in fig. 4, the central depth plane a2 and the integrated plane b3 are located in front of the microlens array 200), and the screen effect is exhibited. Therefore, the depth of the whole 3D picture viewed by a user is greatly enhanced, the layers are different, and the stereoscopic impression is enhanced.
In this embodiment, as shown in fig. 4 and 5, it is preferable that the display pixels of the display surface of the first curved display screen gradually decrease from the central region of the display screen 100 to the edge region of the display surface, and the distance between the corresponding optical center of the lens element 210.
By adopting the above scheme, since the distance between the display pixels of the display screen 100 and the microlens array 200 gradually changes, the depth of the picture seen by the user when watching the picture gradually changes, which is more beneficial to watching the gradation change of the picture.
It should be noted that, in this embodiment, the display screen 100 is a curved display screen, and the microlens array 200 is a structure in which the optical centers of the lens elements 210 are located on the same plane, in other embodiments of the present invention, the display screen 100 may also be a curved display screen, and the microlens array 200 may also be a curved microlens array in which the optical center of each lens element 210 is located on a curved surface, as long as the display pixels at different positions of the display screen 100 and the optical centers of the corresponding lens elements 210 have different distances.
Example 2
Fig. 6 and 7 are schematic structural diagrams illustrating a 3D display device according to a second embodiment of the present invention.
As shown in fig. 6 and 7, in the present embodiment, the display screen 100 is a second curved display screen with a middle portion protruding toward the microlens array 200; the distance between the display pixel of the edge region of the display surface of the second curved display screen and the corresponding optical center of the lens element 210 is greater than the focal length of the lens element 210, and the distance between the display pixel of the middle region of the display surface of the second curved display screen and the corresponding optical center of the lens element 210 is less than the focal length of the lens element 210.
In this embodiment, the display panel 100 may be any display device such as an LCD, an OLED, etc., and the display panel 100 is designed as a curved display panel, and the optical centers of the lens elements 210 in the microlens array 200 are located on a plane, so that the distances between the display pixels in the edge area and the middle area of the display panel 100 and the microlens array 200 are different, and preferably, the distance between the display pixels in the edge area of the display panel 100 and the optical centers of the corresponding lens elements 210 is greater than the focal length of the microlens array 200, and the 3D image imaging position is in front of the microlens array 200 (the central depth plane a2 and the integrated plane 2 in fig. 6 are located in front of the microlens array 200), so as to present a panel effect; and the distance g between the display pixels in the middle area of the display screen 100 and the microlens array 200 is smaller than the microlens focal length f, and the 3D image imaging position is behind the microlens array 200 (the central depth plane a1 and the integration plane b1 in fig. 6 are behind the microlens array 200), thereby presenting the in-screen effect. Therefore, the depth of the whole 3D picture viewed by a user is greatly enhanced, the layers are different, and the stereoscopic impression is enhanced.
In this embodiment, as shown in fig. 6 and 7, it is preferable that the display pixels of the display surface of the first curved display screen gradually increase in distance from the central region of the display screen 100 to the edge region of the display surface and the optical center of the corresponding lens element 210.
By adopting the above scheme, since the distance between the display pixels of the display screen 100 and the microlens array 200 gradually changes, the depth of the picture seen by the user when watching the picture gradually changes, which is more beneficial to watching the gradation change of the picture.
It should be noted that, in this embodiment, the display screen 100 is a curved display screen, and the microlens array 200 is a structure in which the optical centers of the lens elements 210 are located on the same plane, in other embodiments of the present invention, the display screen 100 may also be a curved display screen, and the microlens array 200 may also be a curved microlens array 200 in which the optical center of each lens element 210 is located on a curved surface, as long as the display pixels at different positions of the display screen 100 and the optical centers of the corresponding lens elements 210 have different distances.
Example 3
Fig. 8 and 9 are schematic structural diagrams illustrating a third embodiment of a 3D display device according to the present invention.
As shown in fig. 8 and 9, in the present embodiment, the microlens array 200 is a curved microlens array, an optical center of each lens element 210 of the curved microlens array is on a curved surface, and the curved microlens array is symmetrically arranged to two sides with the middle lens element 210 as a center; wherein the content of the first and second substances,
the curved surface microlens array is a first curved surface microlens array which is arranged at the middle part and protrudes towards the direction of the display screen 100, the display pixels of the edge area of the display surface of the display screen 100 correspond to the lens elements 210, the distance between the lens elements 210 is greater than the focal length of the lens elements 210, the display pixels of the middle area of the display surface of the display screen 100 correspond to the focal length of the lens elements 210, and the distance between the lens elements 210 is smaller than the focal length of the lens elements 210.
With the above scheme, the microlens array 200 is designed as a curved microlens array, the display screen 100 is a flat display screen, and the display screen 100 can be any display device such as an LCD, an OLED, etc., so that the distances between the display pixels in the edge area and the middle area of the display screen 100 and the microlens array 200 are different, and preferably, the distance between the display pixels in the edge area of the display screen 100 and the optical center of the corresponding lens element 210 is greater than the focal length of the microlens array 200, and the 3D image imaging position is in front of the microlens array 200 (in fig. 7, the central depth plane a2 and the integrated plane b2 are located in front of the microlens array 200), so as to present a screen effect; and the distance g between the display pixels in the middle area of the display screen 100 and the microlens array 200 is smaller than the focal length f of the microlenses, and the 3D image imaging position is behind the microlens array 200 (the central depth plane a1 and the integration plane b1 are behind the microlens array 200 in fig. 7), thereby presenting the in-screen effect. Therefore, the depth of the whole 3D picture viewed by a user is greatly enhanced, the layers are different, and the stereoscopic impression is enhanced.
In this embodiment, as shown in fig. 7 and 8, it is preferable that the display pixels on the display surface of the display screen 100 gradually increase in distance from the central region of the display screen 100 to the edge region of the display surface and the optical center of the corresponding lens element 210.
By adopting the above scheme, since the distance between the display pixels of the display screen 100 and the microlens array 200 gradually changes, the depth of the picture seen by the user when watching the picture gradually changes, which is more beneficial to watching the gradation change of the picture.
It should be noted that, in this embodiment, the display screen 100 is a flat display screen, and the microlens array 200 is a curved microlens array, in other embodiments of the present invention, the display screen 100 may also be a curved display screen 100, as long as there are different distances between the display pixels at different positions of the display screen 100 and the optical centers of the corresponding lens elements 210.
Example 4
Fig. 10 and 11 are schematic structural diagrams illustrating a fourth embodiment of a 3D display device according to the present invention.
As shown in fig. 10 and fig. 11, in the present embodiment, the microlens array 200 is a curved microlens array, the optical center of each lens element 210 of the curved microlens array 200 is located on a curved surface, and the curved microlens array 200 is symmetrically arranged to both sides with the middle lens element 210 as a center; wherein the content of the first and second substances,
the curved surface microlens array 200 is a second curved surface microlens array 200 with the middle part protruding towards the direction far away from the display screen 100, the distance between the display pixels of the edge area of the display surface of the display screen 100 and the corresponding lens elements 210 is smaller than the focal length of the lens elements 210, and the distance between the display pixels of the middle area of the display surface of the display screen 100 and the corresponding lens elements 210 is larger than the focal length of the lens elements 210.
With the above scheme, the microlens array 200 is designed as a curved microlens array 200, and the display screen 100 is a flat display screen 100, so that the distances between the display pixels in the edge area and the middle area of the display screen 100 and the microlens array 200 are different, and preferably, the distance between the display pixels in the edge area of the display screen 100 and the optical center of the corresponding lens element 210 is smaller than the focal length of the microlens array 200, and the central depth plane a1 for 3D image imaging is located behind the microlens array 200, thereby presenting a screen-in effect; and the distance g between the display pixels in the middle area of the display screen 100 and the microlens array 200 is greater than the focal length f of the microlenses, and the central depth plane a2 of the 3D image imaging is located in front of the microlens array 200, exhibiting a screen effect. Therefore, the depth of the whole 3D picture viewed by a user is greatly enhanced, the layers are different, and the stereoscopic impression is enhanced.
In this embodiment, as shown in the figure, the display pixels of the display surface of the display screen 100 gradually decrease from the middle region of the display screen 100 to the edge region of the display surface, and the distance between the corresponding optical center of the lens element 210 is gradually decreased.
By adopting the above scheme, since the distance between the display pixels of the display screen 100 and the microlens array 200 gradually changes, the depth of the picture seen by the user when watching the picture gradually changes, which is more beneficial to watching the gradation change of the picture.
It should be noted that, in this embodiment, the display screen 100 is a flat display screen 100, and the microlens array 200 is a curved microlens array 200, in other embodiments of the present invention, the display screen 100 may also be a curved display screen 100, as long as there are different distances between the display pixels at different positions of the display screen 100 and the optical centers of the corresponding lens elements 210.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A 3D display device comprising:
a display screen comprising a display surface, said display surface comprising a sub-image array, said sub-image array comprising a plurality of sub-image elements arranged in an array, each of said sub-image elements comprising a plurality of display pixels;
the micro lens array is used for synthesizing images displayed by the plurality of sub image elements into a three-dimensional image and is arranged on one side of the display surface of the display screen, the micro lens array comprises a plurality of lens elements which are arranged in an array mode, and each lens element is arranged corresponding to one sub image element;
the display screen is characterized in that the optical centers of the display pixels at different positions on the display surface of the display screen and the corresponding lens elements have different distances;
the distance between at least one part of display pixels of the display surface of the display screen and the corresponding optical center of the lens element is smaller than the focal length of the lens element, and the distance between at least another part of display pixels of the display surface of the display screen and the corresponding optical center of the lens element is larger than the focal length of the lens element.
2. 3D display device according to claim 1,
the display screen is a first curved surface display screen with the middle part depressed towards the direction far away from the micro-lens array;
the distance between the display pixel of the edge area of the display surface of the first curved surface display screen and the corresponding optical center of the lens element is smaller than the focal length of the lens element, and the distance between the display pixel of the middle area of the display surface of the first curved surface display screen and the corresponding optical center of the lens element is larger than the focal length of the lens element.
3. 3D display device according to claim 2,
the distance between the display pixels of the display surface of the first curved surface display screen and the optical center of the corresponding lens element is gradually reduced from the middle area of the display screen to the edge area of the display surface.
4. 3D display device according to claim 1,
the display screen is a second curved surface display screen with the middle part protruding towards the direction close to the micro-lens array;
the distance between the display pixel of the edge area of the display surface of the second curved surface display screen and the corresponding optical center of the lens element is larger than the focal length of the lens element, and the distance between the display pixel of the middle area of the display surface of the second curved surface display screen and the corresponding optical center of the lens element is smaller than the focal length of the lens element.
5. The 3D display device according to claim 4,
and the distance between the display pixels of the display surface of the second curved surface display screen and the corresponding optical center of the lens element is gradually increased from the middle area of the display screen to the edge area of the display surface.
6. The 3D display device according to any of claims 1 to 5,
the optical center of each lens element in the micro lens array is positioned on a plane.
7. 3D display device according to claim 1,
the micro lens array is a curved surface micro lens array, the optical center of each lens element of the curved surface micro lens array is positioned on a curved surface, and the curved surface micro lens array is symmetrically arranged towards two sides by taking the middle lens element as a center; wherein the content of the first and second substances,
the curved surface micro lens array is a first curved surface micro lens array with the middle part protruding towards the direction close to the display screen, the distance between a display pixel in the edge area of the display surface of the display screen and the corresponding lens element is smaller than the focal length of the lens element, and the distance between a display pixel in the middle area of the display surface of the display screen and the corresponding lens element is larger than the focal length of the lens element;
or, the curved surface microlens array is the second curved surface microlens array that the middle part is to keeping away from the direction of display screen is sunken, just the marginal zone's of the display surface of display screen display pixel and corresponding distance between the lens unit is greater than the focus of lens unit, the regional display pixel of the middle part of the display surface of display screen and corresponding distance between the lens unit is less than the focus of lens unit.
8. The 3D display device according to claim 7,
the display screen is a flat display screen.
9. 3D display device according to claim 1,
the pitch of the lens elements is equal to the pitch of the sub-image elements.
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| CN108828894B (en) * | 2018-06-07 | 2020-05-05 | 北京邮电大学 | 3D light field display system and method |
| CN109725430B (en) * | 2019-03-06 | 2023-04-07 | 成都工业学院 | Virtual focusing mixed imaging stereo display device |
| CN109765695B (en) * | 2019-03-29 | 2021-09-24 | 京东方科技集团股份有限公司 | Display system and display device |
| CN110244469B (en) * | 2019-06-19 | 2021-03-23 | 中国人民解放军陆军装甲兵学院 | Method and system for determining position and diffusion angle of directional diffuser |
| CN111427166B (en) * | 2020-03-31 | 2022-07-05 | 京东方科技集团股份有限公司 | Light field display method and system, storage medium and display panel |
| US11146780B1 (en) * | 2020-07-06 | 2021-10-12 | A.U. Vista, Inc. | Artificial window with parallax effect |
| CN115202064B (en) * | 2021-04-12 | 2023-10-03 | 幻景启动股份有限公司 | Stereoscopic image display device |
| CN113253477A (en) * | 2021-05-11 | 2021-08-13 | 京东方科技集团股份有限公司 | Optical module, display device and working method thereof |
| CN113791497A (en) * | 2021-09-15 | 2021-12-14 | 京东方科技集团股份有限公司 | Near-to-eye display device, augmented reality glasses and using method |
| CN113791500A (en) * | 2021-09-16 | 2021-12-14 | 京东方科技集团股份有限公司 | Naked eye 3D display device |
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